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day01/part1.py

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+from __future__ import annotations
+
+import argparse
+import os.path
+
+import pytest
+
+import support
+
+INPUT_TXT = os.path.join(os.path.dirname(__file__), 'input.txt')
+
+
+def compute(s: str) -> int:
+    n = 0
+    largest = 0
+    curr = 0
+    for c in s.split('\n'):
+        if c.strip() == "":
+            if curr > largest:
+                largest = curr
+            curr = 0
+        else:
+            curr += int(c)
+    return largest
+
+
+INPUT_S = '''\
+1000
+
+2000
+
+5000
+
+1000
+4001
+'''
+EXPECTED = 5001
+
+
+@pytest.mark.parametrize(
+    ('input_s', 'expected'),
+    (
+        (INPUT_S, EXPECTED),
+    ),
+)
+def test(input_s: str, expected: int) -> None:
+    assert compute(input_s) == expected
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser()
+    parser.add_argument('data_file', nargs='?', default=INPUT_TXT)
+    args = parser.parse_args()
+
+    with open(args.data_file) as f, support.timing():
+        print(compute(f.read()))
+
+    return 0
+
+
+if __name__ == '__main__':
+    raise SystemExit(main())